Solved Wells Gardner 19K7608 Monitor Shading

[eliotcole]

• I'm not sure what to name this as, so I'm happy to take suggestions about what to add, here to the title. ​
• Equally, I'd like some dumb words in there so idiots like me can find this stuff. ​
• Also, this is just as much a 'fix log' as it is a soft help me if you can thread ​

Incident - The Monitor Has a Shaded Part On The Left (As One Looks At It)​

Basically, I bought this knowing full well that it had this shading issue, and have just started to do my initial attempts at (pre-specialist) trying to get this to a nicer state.

So, here's NeoRetro's original cab image from their sales thread a while back:

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I thought that someone had mentioned that it might be a such and such, or a thingamabob, or whoojamawotsit.

Either way, it's taken until now for me to get to looking at it in anger.

I've replaced the caps (no pics, yet) ... but I also haven't tried it, yet. Either way, when I power it all up, tomorrow, I guess we'll know!

Potential Cause - Multiple Capacitors / Resistors Needed Attention​

I don't know if the resistors are fine, but ... they don't look fine.

​

So ... yeah, whilst I have replaced every capacitor that I think I could find ... should I maybe work out what resistors are what?
( I got a bunch from Cricklewood )

Possible Bad Guy​

Could this capacitor on the monitor chassis be the bad link?

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It was hidden behind a bigger one under/behind the flyback(??) ... and ... yeah ... not looking ideal.

 

[gunblade]

that issue is normally c57

 

[eliotcole]

Thanks for the response, @gunblade !

...

Ah, the good old c57.

that issue is normally c57

...

...

...

My friend here just asked: "What in the name of Ayrton Senna Da Silva's shiny appendage is 'c57' when it's at home?"

Of course *** I *** know what the silly little c57 is ... but this idiot doesn’t ... if possible, could you explain it for him (not me, I know everything, and am most wise indeed) like they’re five years old?

 

[gunblade]

capacitor position C57, it's the 47uf 160v

 

[eliotcole]

Aha! Cheers ... 😅

capacitor position C57, it's the 47uf 160v

There’s only one cap not replaced and it's the biggest one on the board ... so I am hopeful that I have replaced the offending c57 buggerino!

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EDIT - Think that the caps resolved the issue, although I've not had a great deal of luck in testing it properly, yet.
Other issues (that I don't understand) are presenting themselves around position / size, etc. But I'll try to resolve those with the dials on the back!
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I will leave replacing the resistors until a later date, but I'll definitely want to do it ... just need to understand how! 😅
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Will update with pictures once I've had a better crack at confirming it.